Mapleprimes Scraper
Spider read mapleprimes.com in 168 ms without a browser and returned 389 lines of clean markdown.
In essence, he discovered that the binary operator *EML*, along with the constant 1,forms a basis for the set of standard scientific-calculator operations.This means that functions like,and operations likeorcan be creating by composing*EML*with itself in clever ways. Some constants and functions are trivial to represent, such as*EML(1,1) = e*or*EML(x, 1) = exp(x)*, others however, are not...With a quick one-command tweak, you can get Maple to use the property of the extended reals thatAnd then with a simple argument about standard branches, you can construct the natural logarithm for real numbers, which immediately leads the constant zero:Which then expands the toolbox further by allowing for the construction unary minus from the constant 0 (since -x = 0 - x), and then addition (since a+b=a-(-b))Since we've constructed addition, subtraction, zero and one, we can technically construct every integer! It would not be very pleasant, and by no means optimal... but you could! Here's 7 for example:The next step to building all the standard functions is multiplication and inversion. And these use the classic trick by using the fact that x=exp(ln(x)) can help simplify:These are compositions of exp, addition, ln, and unary minus (all functions constructed previously), which means they can be made with only EML:It's at this point that I will leave the derivation of division (a/b) and exponentiation (a^b) as exercises for the reader, so I can skip to something a little more*complex...*To go beyond the basic operators, you'll need to step into the complex domain by constructing the imaginary constant i. To do this, take ln(-1) = -i*Pi (by using the standard branch) and combine it with Euler's formulaAnd once again the expression on the left-hand side is made up of operations that were all previously defined, so you can compose EML to get a new constant:The same call, in code.
The capture above came back as markdown. These examples add a key, so you get browser rendering, proxies, and concurrency on mapleprimes.com.
import { SpiderBrowser } from "spider-browser";
const spider = new SpiderBrowser({
apiKey: process.env.SPIDER_API_KEY!,
});
await spider.connect();
const page = spider.page!;
await page.goto("https://mapleprimes.com");
// No selectors, no schema. Spider reads the page and names the fields.
const data = await page.scrape();
console.log(data);
await spider.close();import { Spider } from "@spider-cloud/spider-client";
const spider = new Spider({ apiKey: process.env.SPIDER_API_KEY! });
const result = await spider.scrapeUrl("https://www.mapleprimes.com", {
return_format: "markdown",
});
console.log(result);Ready for volume? Get an API key →
Fields you can pull.
Spider names these from the page. The capture above came back as markdown; the same
call with return_format: "json" returns them as keys.
What mapleprimes.com costs to scrape.
The capture above cost $0.000215 to fetch. Pricing is $1 per GB of pre-transformation bandwidth plus $0.001 per CPU minute, so a page like this one lands at a fraction of a cent. Failed requests are billed at $0.
- Free balance on signup
- No card required to test
- Balance never expires
Run it keyless, no account
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Start scraping mapleprimes.com.
You already have the call. A key raises the rate limit and turns on browser rendering, proxies, and concurrency. Balance never expires, and top-ups go through secure checkout.